本文整理汇总了C++中OGRGeomFieldDefn::IsNullable方法的典型用法代码示例。如果您正苦于以下问题：C++ OGRGeomFieldDefn::IsNullable方法的具体用法？C++ OGRGeomFieldDefn::IsNullable怎么用？C++ OGRGeomFieldDefn::IsNullable使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类OGRGeomFieldDefn的用法示例。
在下文中一共展示了OGRGeomFieldDefn::IsNullable方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: ReportOnLayer
static void ReportOnLayer( OGRLayer * poLayer, int bVerbose )
{
OGRFeatureDefn *poDefn = poLayer->GetLayerDefn();
/* -------------------------------------------------------------------- */
/* Report various overall information. */
/* -------------------------------------------------------------------- */
printf( "\n" );
printf( "Layer name: %s\n", poLayer->GetName() );
if( bVerbose )
{
int nGeomFieldCount =
poLayer->GetLayerDefn()->GetGeomFieldCount();
if( nGeomFieldCount > 1 )
{
for(int iGeom = 0;iGeom < nGeomFieldCount; iGeom ++ )
{
OGRGeomFieldDefn* poGFldDefn =
poLayer->GetLayerDefn()->GetGeomFieldDefn(iGeom);
printf( "Geometry (%s): %s\n", poGFldDefn->GetNameRef(),
OGRGeometryTypeToName( poGFldDefn->GetType() ) );
}
}
else
{
printf( "Geometry: %s\n",
OGRGeometryTypeToName( poLayer->GetGeomType() ) );
}
printf( "Feature Count: " CPL_FRMT_GIB "\n", poLayer->GetFeatureCount() );
OGREnvelope oExt;
if( nGeomFieldCount > 1 )
{
for(int iGeom = 0;iGeom < nGeomFieldCount; iGeom ++ )
{
if (poLayer->GetExtent(iGeom, &oExt, TRUE) == OGRERR_NONE)
{
OGRGeomFieldDefn* poGFldDefn =
poLayer->GetLayerDefn()->GetGeomFieldDefn(iGeom);
CPLprintf("Extent (%s): (%f, %f) - (%f, %f)\n",
poGFldDefn->GetNameRef(),
oExt.MinX, oExt.MinY, oExt.MaxX, oExt.MaxY);
}
}
}
else if ( poLayer->GetExtent(&oExt, TRUE) == OGRERR_NONE)
{
CPLprintf("Extent: (%f, %f) - (%f, %f)\n",
oExt.MinX, oExt.MinY, oExt.MaxX, oExt.MaxY);
}
char *pszWKT;
if( nGeomFieldCount > 1 )
{
for(int iGeom = 0;iGeom < nGeomFieldCount; iGeom ++ )
{
OGRGeomFieldDefn* poGFldDefn =
poLayer->GetLayerDefn()->GetGeomFieldDefn(iGeom);
OGRSpatialReference* poSRS = poGFldDefn->GetSpatialRef();
if( poSRS == NULL )
pszWKT = CPLStrdup( "(unknown)" );
else
{
poSRS->exportToPrettyWkt( &pszWKT );
}
printf( "SRS WKT (%s):\n%s\n",
poGFldDefn->GetNameRef(), pszWKT );
CPLFree( pszWKT );
}
}
else
{
if( poLayer->GetSpatialRef() == NULL )
pszWKT = CPLStrdup( "(unknown)" );
else
{
poLayer->GetSpatialRef()->exportToPrettyWkt( &pszWKT );
}
printf( "Layer SRS WKT:\n%s\n", pszWKT );
CPLFree( pszWKT );
}
if( strlen(poLayer->GetFIDColumn()) > 0 )
printf( "FID Column = %s\n",
poLayer->GetFIDColumn() );
for(int iGeom = 0;iGeom < nGeomFieldCount; iGeom ++ )
{
OGRGeomFieldDefn* poGFldDefn =
poLayer->GetLayerDefn()->GetGeomFieldDefn(iGeom);
if( nGeomFieldCount == 1 &&
EQUAL(poGFldDefn->GetNameRef(), "") && poGFldDefn->IsNullable() )
//.........这里部分代码省略.........
示例2: ReportOnLayer
//.........这里部分代码省略.........
CPLFree(pszWKT);
if( poSRS )
{
displayDataAxisMapping(poSRS);
}
}
}
else
{
char *pszWKT = nullptr;
auto poSRS = poLayer->GetSpatialRef();
if( poSRS == nullptr )
{
pszWKT = CPLStrdup("(unknown)");
}
else
{
poSRS->exportToPrettyWkt(&pszWKT);
}
printf("Layer SRS WKT:\n%s\n", pszWKT);
CPLFree(pszWKT);
if( poSRS )
{
displayDataAxisMapping(poSRS);
}
}
if( strlen(poLayer->GetFIDColumn()) > 0 )
printf("FID Column = %s\n",
poLayer->GetFIDColumn());
for(int iGeom = 0;iGeom < nGeomFieldCount; iGeom ++ )
{
OGRGeomFieldDefn* poGFldDefn =
poLayer->GetLayerDefn()->GetGeomFieldDefn(iGeom);
if( nGeomFieldCount == 1 &&
EQUAL(poGFldDefn->GetNameRef(), "") &&
poGFldDefn->IsNullable() )
break;
printf("Geometry Column ");
if( nGeomFieldCount > 1 )
printf("%d ", iGeom + 1);
if( !poGFldDefn->IsNullable() )
printf("NOT NULL ");
printf("= %s\n", poGFldDefn->GetNameRef());
}
for( int iAttr = 0; iAttr < poDefn->GetFieldCount(); iAttr++ )
{
OGRFieldDefn *poField = poDefn->GetFieldDefn(iAttr);
const char* pszType = (poField->GetSubType() != OFSTNone)
? CPLSPrintf(
"%s(%s)",
poField->GetFieldTypeName(poField->GetType()),
poField->GetFieldSubTypeName(poField->GetSubType()))
: poField->GetFieldTypeName(poField->GetType());
printf("%s: %s (%d.%d)",
poField->GetNameRef(),
pszType,
poField->GetWidth(),
poField->GetPrecision());
if( !poField->IsNullable() )
printf(" NOT NULL");
if( poField->GetDefault() != nullptr )
printf(" DEFAULT %s", poField->GetDefault());
printf("\n");
}
}
/* -------------------------------------------------------------------- */
/* Read, and dump features. */
/* -------------------------------------------------------------------- */
if( nFetchFID == OGRNullFID && !bSummaryOnly )
{
OGRFeature *poFeature = nullptr;
while( (poFeature = poLayer->GetNextFeature()) != nullptr )
{
if( !bSuperQuiet )
poFeature->DumpReadable(nullptr, papszOptions);
OGRFeature::DestroyFeature(poFeature);
}
}
else if( nFetchFID != OGRNullFID )
{
OGRFeature *poFeature = poLayer->GetFeature(nFetchFID);
if( poFeature == nullptr )
{
printf("Unable to locate feature id " CPL_FRMT_GIB
" on this layer.\n",
nFetchFID);
}
else
{
poFeature->DumpReadable(nullptr, papszOptions);
OGRFeature::DestroyFeature(poFeature);
}
}
}